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수중환경 변수의 변화에 따른 능동소나 표적검출 성능분석에 관한 연구
윤대희,이충용,성하종,박성범,정형성 연세대학교 산업기술연구소 1997 논문집 Vol.29 No.2
In this paper, the performance of active sonar system is analyzed under various underwater acoustic environments using the multipath eigenray model in shallow water. In addition, an approximated shallow-water propagation model is proposed for the active sonar based on MacPherson and Daintith's model and corresponding equations comprising active sonar parameters are derived. To analyze the sonar performance according to the changes of various sonar parameters, a large number of measurements and results in ocean acoustics and digital signal processing are combined. The proposed model is compared with the multi-path eigenray model in terms of the echo level passed through the beamformer, the input SNR of the detector and the detection probability.
Back Propagation 알고리즘을 이용한 산업용 로봇의 견실제어
윤주식,이희섭,윤대식,한성현 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-
Neural networks are works are used in the framework of sensor based tracking control of robot manipulators. They learn by practice movements the relationship between PSD(an analog Position Sensitive Detector) sensor readings for target positions and the joint commands to reach them. Using this configuration, the system can track or follow a moving or stationary object in real time. Furthermore, an efficient neural network architecture has been developed for real time learning. This network uses multiple sets of simple back propagation networks one of which is selected according to which division(corresponding to a cluster of the self-organizing feature map) in data space the current input data belongs to. This lends itself to a very training and processing implementation required for real time control.
홍영대,김윤희 고신대학교 영도발전연구소 2000 영도연구 Vol.2 No.-
Youngdo Island is suitable to be developed as a tourist town due to its beautiful natural surroundings. In connection with the above purpose, various harmful heavy metals were analyzed to investigate the level of pollution of Youngdo soil. The elements tested were Cd, As, Sn, Cr, Cu, Pb, Co, Ni, Mn and Zn. The results from Youngdo were compared with those of the Busan and the whole country in the investigation items which were decided by the Korean Ministry of Environment. The average contents of heavy metals in Youngdo soil were comparatively lower than those of Busan, and close to those of the whole country including uncontaminated natural soil. It was found that Youngdo-Gu remains clean soil environment except a few investigated sites at the industrial areas even though this district belongs to the Metropolitan Busan. This fact implies that Youngdo is to get well ready for a tourist town.
산소분압열처리를 이용한 폐기물산화철로부터의 단상 및 복합상 산화철의 제조
임희대,이찬규,허석환,박연준 國立 昌原大學校 産業技術硏究所 1998 産技硏論文集 Vol.12 No.-
Oxygen pressure heat-treatment with CO-CO2 gas mixture was introduced to purify the waste oxidized iron in shortblast process. To determine the temperture and oxygen partial pressure, Fe-O phase diagrams was used. single phase FeO, Fe₃O₄and composite phase FeO-Fe₃O₄, Fe-FeO could be obtained sucessfully in the range of 10(-17)∼10(-19) in Po₂at 800℃.
조병모,윤대희,차일환 연세대학교 산업기술연구소 1989 논문집 Vol.21 No.2
Preliminary experiments of using the LPC parameter for text-independent speaker identification problem are presented. The identification process includes log likelihood ratio for distance measure and dynamic programming for time normalization. To generate the data base for experiments, ten speakers were asked to utter the same sentence ten times. Experimental results show 99.4% of identification accuracy. Incorrect identification were made when the speaker uses a dialect.
강지원(Kang Gi-won),김대진(Kim Dae-jin),안신희(Ahn Shin-hee),고재윤(Ko Jae-youn) 한국호텔관광학회 2016 호텔관광연구 Vol.18 No.2
As domestic spending on wine increases, the importance of the marketing strategies for wine products has been emphasized in the hospitality industry for the purpose of increasing business profits. Korean wine festivals is held in Young-dong and Youngcheon every October and November. Also, ‘Asian wine trophy’ is held every August in Dae-Jeon city of Korea. At that competition, several Korean wines won gold medals among the world’s wines. It means that the quality of Korean wine is being improved rather than before. And it can lead interest of Korea and Korean wine and enhanced status of Korea in the global wine market. The purpose of this study is to find out the relationship between Korean wine evaluation and perceived value and furthermore, relationship with satisfaction. In this study, a survey was carried out on experienced wine consumers over the age of 20 from October 15 through November 4, 2015. Overall, 315 questionnaires from internal customers were used for the final data analysis. The SPSS/PC version 20.0 and AMOS 20.0 statistics package programs were used for the confirmatory factor analysis, reliability analysis and pass analysis to test the hypotheses for this study. The result of the present study indicates that Korean wine evaluation was significant on Perceived value and the effect of Perceived value had a significant positive effect on satisfaction. The results of this paper suggests specific marketing strategy for winery owner of Korea and Korean wine company.
Dae Hong Lee,Eun Jin Kang,Hee Bong Seok,Chang Wook Jo,Cho Rong Park,Mi Ja Seo,Yong Man Yu,Young Nam Youn 한국응용곤충학회 2008 한국응용곤충학회 학술대회논문집 Vol.2008 No.10
As an effective generalist predator of aphids and other hemipteran pests, Harmonia axyridis has been a successful biological control agent. Interestingly, it was known that there were varied in color patterns on H. axyridis elytra. In fact, Seo & Youn (2007) reported that H. axyridis had five color patterns, for example, succinea 1, 2, conspicua, spectabilis, and axyridis. But there are uncertain that H. axyridis elytra colour patterns are regulated by genetic polymorphism. So we tried to what is the reason that color patterns are greatly variable. To identify DNA markers linked to a elytra polymorphism, amplified fragment length polymorphism (AFLP) analysis was performed on DNA samples from four female succinea, conspicua, spectabilis and Coccinella septempunctata which is another species in Coccinellidae. AFLP analysis with the restriction endonuclease combination EcoRⅠ and MseⅠwas performed. Using 12 AFLP primer pairs, nine AFLP fragments which is specific between succinea, conspicua, spectabilis was identified. These nine AFLP fragments were isolated, cloned and sequenced. Subsequent UPGMA cluster analysis revealed three major group of H. axyridis populations. These genetic tree showed that H. axyridis elytra colour diversity was affected by genetic polymorphism. For more genetically understanding elytra colour genes, different primer combinations may be need to be generate enough polymorphic markers. These genetic analyses may be facilitate the understanding of molecular mechanism behind wing colour pattern formation.
Basic : A case of propylthiouracil-induced acute hepatic failure (초)
( Dae Seon Ahn ),( In Hee Kim ),( Ji Youn Sohn ),( Dae Hun Kwon ),( Kang Hun Koh ),( Bum Soo Jeong ),( Seong Hun Kim ),( Sang Wook Kim ),( Seung Ok Lee ),( Soo Teik Lee ),( Dae Ghon Kim ),( Hee Chul Y 대한간학회 2011 Clinical and Molecular Hepatology(대한간학회지) Vol.17 No.3(S)
아마추어 골프선수들의 해외전지훈련 활동에 대한 교육적 의미
이대연(Dae Youn Lee),최상범(Sang Bum Choi),정연수(Youn Soo Jung),김백수(Baig Soo Kim),유희명(Hee Myoung Yu),김승완(Seung Wan Kim),배성만(Sung Man Bae) 한국사회체육학회 2008 한국사회체육학회지 Vol.0 No.34
The purpose of this study was to inquire educational meanings of overseas field exercise on the assumption that overseas field exercise for amateur golfers is one of educational phenomena. The results could be summarized as follow: First, according to guidance instructor, the educational purpose is to `cultivate learners of self-initiative.` The guidance instructors were in agony regarding education, and those agonies became strategies of teaching self-initiative in details. The strategies of teaching self-initiative were the center of attention in this study. It was observed from the perspective that emphasizing `put a vision into practice.` In addition, the golfers had various feelings, and they kept reminding themselves `to learn more than` just skills, knowledge, or tournament tactics through the field exercises. Second, the activities and behaviors of guidance instructors during overseas field exercises were observed as teaching strategy in order for them to emphasize the meaning of self-initiative. Moreover, learners, on the other hand, also had their own studying strategies by experiencing the field: fun and duty.